Thermal pack



FIG. 1 is a perspective view of a thermal pack according to my design;

FIG. 2 is top plan view thereof;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is a left side elevational view thereof.

The bottom plan view is a mirror image of the top plan view. The rear elevation view is a mirror image of the front elevation view. The right side elevation view is a mirror image of the left side elevation view. 

CLAIM The ornamental design for a thermal pack, as shown and described. 